Hellboy has added new cast members Sophie Okonedo, Brian Gleeson and Alistair Petrie, according to Deadline. Okonedo will play Lady Hatton, a seer at the Osiris Club, “an ancient English club dedicated to uncovering supernatural mysteries.” Petrie will play a member of the club, Lord Adam Glaren, and Gleeson will play Merlin, the wizard from Arthurian legend.

David Harbour of Stranger Things is set to star as the titular hero in the Lionsgate and Millennium film, which is slated to begin filming in September. Ian McShane (Deadwood, American Gods) will play Hellboy’s adoptive father, Professor Trevor Bruttenholm (aka Professor Broom), Milla Jovovich (The Fifth Element, Resident Evil franchise) has been cast as villain the Blood Queen, Sasha Lane (American Honey) will play Alice Monaghan, Penelope Mitchell (Hemlock Grove) will play the elder witch Ganeida, and Daniel Dae Kim (Hawaii Five-0, LOST) is playing Major Ben Daimio.

Neil Marshall (The Descent, Game of Thrones) will direct from a script from Andrew Cosby (Eureka), Christopher Golden and Mike Mignola. Larry Gordon and Lloyd Levin will produce with Mike Richardson of Dark Horse Entertainment.

First appearing in Dark Horse comics beginning in 1993, Hellboy is a demon summoned from Hell by the Nazi occultists near the end of World War II. Raised by Professor Trevor Bruttenholm of Bureau for Paranormal Research and Defense, Hellboy went on to be billed as “The World’s greatest occult detective.” The adventures of the character have been chronicled in countless comics, including his time with the Bureau, his early years as a young boy, and even the time he spent in hell after dying on Earth. The main Hellboy title has also served as a launching pad for other characters and stories, including Abe Sapien, Lobster Johnson, BPRD, Sledgehammer 44 and others.

What do you think of the casting of Okonedo, Gleeson and Petrie? Let us know in the comments.